TIP121 is out of stock and can be placed on backorder.
Available Substitutes:

Direct


onsemi
In Stock: 1,350
Unit Price: $1.55000
Datasheet

Direct


onsemi
In Stock: 1,000
Unit Price: $1.54000
Datasheet

Similar


onsemi
In Stock: 0
Unit Price: $1.12000
Datasheet
Bipolar (BJT) Transistor NPN - Darlington 80 V 5 A 2 W Through Hole TO-220
Image shown is a representation only. Exact specifications should be obtained from the product data sheet.

TIP121

DigiKey Part Number
497-2537-5-ND
Manufacturer
Manufacturer Product Number
TIP121
Description
TRANS NPN DARL 80V 5A TO-220
Manufacturer Standard Lead Time
14 Weeks
Customer Reference
Detailed Description
Bipolar (BJT) Transistor NPN - Darlington 80 V 5 A 2 W Through Hole TO-220
Datasheet
 Datasheet
EDA/CAD Models
TIP121 Models
Product Attributes
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Category
Current - Collector Cutoff (Max)
500µA
Mfr
DC Current Gain (hFE) (Min) @ Ic, Vce
1000 @ 3A, 3V
Packaging
Tube
Power - Max
2 W
Part Status
Active
Operating Temperature
150°C (TJ)
Transistor Type
Mounting Type
Through Hole
Current - Collector (Ic) (Max)
5 A
Package / Case
TO-220-3
Voltage - Collector Emitter Breakdown (Max)
80 V
Supplier Device Package
TO-220
Vce Saturation (Max) @ Ib, Ic
4V @ 20mA, 5A
Base Product Number
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (3)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
TIP121Gonsemi1,3502832-TIP121G-ND$1.55000Direct
TIP121TUonsemi1,0002832-TIP121TU-ND$1.54000Direct
TIP120Gonsemi0TIP120GOS-ND$1.12000Similar
In-Stock: 0
50 estimated in stock on 04-Jan-2027
Request Stock Notification
All prices are in USD
Tube
QuantityUnit PriceExt Price
1$0.97000$0.97
50$0.44620$22.31
100$0.39460$39.46
500$0.30372$151.86
1,000$0.27445$274.45
2,000$0.24981$499.62
5,000$0.22313$1,115.65
10,000$0.20664$2,066.40
50,000$0.19250$9,625.00
Note: Due to DigiKey value-add services the packaging type may change when product is purchased at quantities beneath the standard package.
Tariff Status: Tariff may apply if shipping to the United States. Estimated tariff costs will be calculated and displayed in the shopping cart to help you assess potential expenses.